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A mobile phone connects to the telephone network by radio waves exchanged with a local antenna and automated transceiver called a cellular base station (cell site or cell tower). The service area served by each provider is divided into small geographical areas called cells , and all the phones in a cell communicate with that cell's antenna.
4G is the current mainstream cellular service offered to cell phone users, performance roughly 10 times faster than 3G service. [ 4 ] One of the most important features in the 4G mobile networks is the domination of high-speed packet transmissions or burst traffic in the channels.
The cell phone is an example of the social shaping of technology (Zulto 2009). The cell phone has evolved over the years to make our lives easier by providing people with handheld computers that can answer calls, answer emails, search for information, and complete numerous other tasks (Zulto, 2009).
A new review of previous research determines if cell phone radiation causes brain cancer. The review concludes that radiation from cell phones is not likely to increase a person’s risk of brain ...
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus. A mobile phone, or cell phone, [a] is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones (landline phones).
These types of phones are more durable and have the technology to change certain parts of the phone making them more environmentally friendly. Being able to simply replace the part of the phone that is broken will reduce e-waste. [15] An estimated 50 million tons of e-waste are produced each year. [16]
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